Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11007944 | Automatic railing for a retractable stairway | Kelly Maureen Sorgenfrey | 2021-05-18 |
| 9994141 | Retractable platform and staircase for a recreational vehicle | Vincent Buls | 2018-06-12 |
| 9725042 | Retractable staircase for a recreational vehicle | Vincent Buls | 2017-08-08 |
| 8529184 | Saddle rack lift mechanism | Vincent Buls | 2013-09-10 |
| 8186744 | Recreational vehicle with a convertible bed | Vincent Buls | 2012-05-29 |
| 8091940 | Expandable room leveling system and method | Vincent Buls | 2012-01-10 |
| 8075008 | Retractable staircase for a recreational vehicle | Vincent Buls | 2011-12-13 |
| 7857361 | Coupler assembly | Marc Edward Frerichs, Joshua Gnewuch | 2010-12-28 |
| 7806417 | Height averaging means for use with a motor vehicle suspension control system | Marc Edward Frerichs | 2010-10-05 |
| 7717485 | Universal room extension for expandable rooms | Vincent Buls | 2010-05-18 |
| 7685927 | Hydraulic synchronizing cylinder | Marc Edward Frerichs | 2010-03-30 |
| 7603942 | Synchronization cylinder having chambers with different volumes | Marc Edward Frerichs | 2009-10-20 |
| 7419202 | Seal for expandable rooms | Vincent Buls | 2008-09-02 |
| 7380854 | Device for removing water and other debris from the roof of an expandable room on a vehicle | Vincent Buls | 2008-06-03 |
| 6905154 | Universal room extension | Vincent Buls, Stacy Hanser | 2005-06-14 |
| 6729670 | Linkage for expandable rooms | Vincent Buls | 2004-05-04 |
| 6708454 | Pivot connector for extendable rooms | Marc Edward Frerichs | 2004-03-23 |
| 6679541 | Chain driven linkage assemblies for room extensions | Stacy Hanser | 2004-01-20 |
| 6665597 | Automatic suspension control system for motor vehicles | John Friede, Mitchell P. Schmalz | 2003-12-16 |
| 6658798 | Floor slot room extender | Marc Edward Frerichs | 2003-12-09 |
| 6533338 | Vertical arm flat floor extension and vertical arm housing | Marc Edward Frerichs | 2003-03-18 |
| 6345855 | Level floor room extension | Stacy Hanser | 2002-02-12 |
| 6186692 | Locking mechanism for expandable rooms | Stacy Hanser | 2001-02-13 |
| 6067756 | Space saving room extender | Marc Edward Frerichs | 2000-05-30 |
| 6052952 | Flat floor room extension | Marc Edward Frerichs | 2000-04-25 |